Stopping mechanism for looms.



0.I A. SAWYER.

sToPPING MEGHANISM PoR Looms.

APPLICATION FILED AUG.31, 1908.

Patented Aug. 23,1910.

2 SHEETS-SHEET 1A ef) a INVEZOR: BaMa/ay W V 1 ma, i ATTORNEY.

O. A. I SAWYER.

STOPPING MEGHANISM FOR LOOMS.

APPLIoATIoN FILED AUG.31, 190s.

Patented Aug. 23, 1910.

2 SHEETS-SHEET 2A WITNESSES:

22710, V12 INVENTOR- W BY Wkm 6J ATTORNEY.

UNITED STATES rATnnT orrucn.

ORREN A.l SAWYER, OF LOWELL, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO THISSELL COMPANY, 0F PORTLAND, MAINE, A CORPORATION OF MAINE.

STOPPING MECHANTSM FOR LOOMS.

seance.

Specification of Letters Patent.

Patentes Aug. as, aero.

Application led .August 31, 1908. Serial No. 450,972.

To all whom it may camera:

Be it known that I, ORREN A. SAWYER, a citizen of the United States, residing at Lowell, in the county of Middlesex and Commonwealth of Massachusetts, have invented a certain new and useful Improvement in Stopping Mechanism for Looms, of which of one or more warp threads from the cloth.Y

This mechanism will also stop the loom when there are bunches, kinks or loops in the lilling or bunches of sizing on the warps, which rise above thesurface of the cloth and engage the point of a detector; when there are draws or puckers in the cloth which may be caused by the warp-threads catching on the lease-rod by reason of knots and then being suddenly released or by anything which holds back the warp-threads and. then suddenly releases them; or when by accident or carelessness a liner illing is introduced as .the shuttle becomes empty, which makes the cloth looser.

The stopping mechanism herein described may, if desired, be used with the usual stopmotions which act to stop the loom instantly upon the `failure of the-warp or illing and will detect many cloth defects not remedied by them and diminish the number and amount of pick-outs heretofore required, and

may be so adapted as to be operated only byl defects which on inspection would place the cloth among seconds as in the case of comparatively cheap fabrics, or may be adapted to discover defects lessjn extent in vhigher classes of fabrics.

In the accompanying drawing, on two sheets, Figure 1 is a front elevation'of so much of a loom provided with said invention as is necessary to the understanding of the same; showing a part of the frame including the breast-beam, parts of the cam-shaft, lay, shipper, holding-plate and knock-oil lever; Fig. 9., a plan of the vibrator and connected parts, the breast-beam, holding-plate, lay,

shipper and knock-oil lever, the parts being represented as in position to knock ofi'v the shipper; Fig. 3, ,a left side elevation of the stopping devices and the actuating mechanism, showing the lay and breast-beam in yvertical section onthe line 3 3 in Fig. 1;

Fig. a, a front elevation of a part of the vibrator with detectors; Fig. 5, a vertical section of the same on the line 5 5 in Fig. l; Figs. 6 and 7, respectively', a front and a side elevation or an end of a detector; Fig. 8, a plan of a modified form of the vibrator and its bearings; Fig. 9, a front elevation of a part of the same; Fig. l0, an enlarged plan i of a portion of the vibrator shown in Fig. 8.

A indicates the frame; a, the breast-beam; B, the lay; C, the reed; l) D1, shuttle-boxes; E, the holding-plate provided with a notch c which holds the shipper F in the operative position of the loom; f, `the spring which y throws the shipper to stop the;l`oom when said shipper is released from'the notch e; G G1, the temples; H, the'stop-motion fork, mounted on the slide it; l, the cam-shaft;- these parts being all of the usual construction.

In suitable brackets j-j1, rigidly secured on the breast-beam or other parts of the frame, is mounted parallel with the breastbeam, the vibrator J, the same being av bar capable of longitudinal oscillation in said brackets.v The vibrator J is caused tomove alternately in opposite directions between the beats of the lay by a forked lever K suitably ulcrumed, as at con a hanger k1 secured to the breast-beam, the upper forked end k2 of, said lever straddling said vibrator between two springs represented as spiral wire springs jz'j surrounding said vibrator and compressed betweensaid fork k2 and 'I of the vibrator. rlhe lower end of the lever K engages a cam l represented as a peripheral ridge on a cylinder L which is free to turn on a horizontal 4stud Z1, supported on a vbracket ZZsecured on the frame A; said cyl- "inder being concentric and fast to a sprocketwheel fm. connected by a chain M to another sprocket-wheel i fast on the cam-shaft I,

eeaoee which is usually driven at half the speed of i which is regarded as sufliciently important the crank-shaft which swings the lay. rlhe cam Z is so formed and set that the vibrator J is. caused to move in one direction before one beat or forward'movenient of the lay and in the opposite direction before the next beat of said lay, and said cam is provided with rests Z3 Z4, 'so that the vibrator is always at one end or the other of its traverse and at rest when the lay beats up.

A bunter N is hinged to some convenient part of the lay, preferably as shown, to the front side of the mouth of the shuttle-box D1 which is nearest the shipper F, in such a manner that the free forward end of said bunter can, if allowed to do so, rise above or fall into the plane of a knock-off lever 0 which turns on a vertical stud 02 secured on the top of the breast-beam, the outer arm 0 of said lever reaching in front of the ship per and the inner arm. 01 being adapted to be struck by said bunter if in the same plane therewith9 when the lay beats up or swings forward, and thus cause the shipper to be thrown out of the notch @and the loom to be stopped by thev usual means., The free end of the bunter N rises when the lay swings backward and when the lay is beating up, descends upon the vibrator rides upon the saine and is normally held therebycabove the knocked lever when said vibrator is at either end of its traverse but the vibrator is provided in its upper surface with a depression j7 of a depth suiiicient to allow the for`- ward end of the bunter to descend to the level of the knock-od lever and of such a. length that unless the vibrator 1s at the end of its'traverse the bunter as the lay swings forward falls over and into said depression7 as shown in Figs. l and 2, and operates the knock-off lever to throw the shipper F out of the notch e. `When the vibrator is at either end of its traverse and the lay beats up, the bunter falls upon the vibrator at the side of the depression t7'7 farthest from. said end and is prevented from striking the knock-od lever. The downward movement of the bunter on its pivot or hinge n is limited by a downward stop projection nl on said bunter wihich rests against the front of the shuttlebox (Fig. 3) and holds the front end of said bunter high enough to pass first over the top of the vibrator before descending onto said vibrator or into the depression 57.

A. series of detectors F turn on horizontal pivots p on a vertical face.J preferably on the front face js of the vibrator J where they may be seen and removed or replaced readily. Each detector F is provided with two fingers p1 p2 which extend on each side of the pivot in a plane parallel with the face je of the vibrator J5 the ends p3 p4 of said ngers being rounded and wedge-shaped (see Figs. 6 and 7) and of a size to allow theni to engage the smallest defect or narrowest hole to stop the loom for, considering the kind and quality of the cloth being manufactured. Each detector is provided in the naiddle portion with a curved and roughened or toothed part p5 which is concentric with the pivot p` and in contact with the upper surface of the cloth, so that'as the vibrator is reciprocated the detector is turned on its pivot and brings the n'ger p1 or p2 which is then in advance against the cloth with a suficient pressure to engage a knot, loop or hole on or in the cloth and to stop the vibrator before the latter reaches the end of its traverse, allowing the iooin 1to be stopped by the action of the bunter on the knock-off lever at the next beat of the lay. Fach detector is provided with twostop projections p7 p8 arranged on opposite sides of the pivot,

which strike one at a time against the nndenside of a stop-ledge j@ which entends from the top of the vibrator J forward over said detector and prevents the detectors troni `turning so far as unnecessarily to enlarge the hole or other defect in the cioth or to remove the part p5 out of contact with the cloth which part p5 rnust always be in con.- tact with the cloth to keep the linger in advance in contact with said cloth.

In order that the vibrator throughout the greater part of its length may be as near as possible to the making edge of the cloth and yet out lof the way of the temples G G1 which yield when the lay beats up, the forni of vibrator shown in Figs.. 8, 9 and i0', may be used. in those figures the. part il is or may be precisely like the part d shown in Fig. l, but only a few detectors l) are pivoted directly on the bar J1, these being arranged in. front of the loom-temples7 the other detectors being pivoted on another bar J2 arranged parallei with the bar J1 but only long. enough to cover the space between the temples and to vibrate between them without striking them/The bar J2 is rovided with forward extensions jl@ ju which are attached to the bar J1 preterably by hinges j j which allow the bar J2 to be turned up out of the way if desired. spiral spring jM acting torsionaliy and connecting the bars J1 and J2 normally holds said bars in the samevhorizontal plane., The modiipd'bar or vibrator as shown in Figs. 8-10 1s operated precisely as the vibrator d above described-and is used in connection with the same partsa l claim as rny invention 1. The combination in a loom, of a detector, arranged between the making edge of the cloth and the front of the loom, a support on which said detector has a limited movement, arranged transversely of said cloth, said detector normally pressing upon said cloth, means for vibrating said support7 said support being prevented from vibration ras bly the engagement of said detector with a c oth-defect, and means for stopping said loom when said support is stopped.

2. The combination in aloom, of a support arranged transversely thereof, means for moving said support transversely of the loom, a series ofV detectors carried by said support, and havin a limited movement thereon and normally 1n contact with said cloth, said detectors being adapted, inde endently of each other, to engage cloth-de ects and to stop said support and means for stopping said loom when said support is stopped.

3. The combination in a loom, of a vertically movable support arranged transversely of the cloth'in said loom, means for moving said support longitudinally, a series of detectors carried by said support and having a limited movement thereon and normally in contact with said cloth; said detectors adapted to engage independently of each other cloth-defects and to stop said support and means for stopping said loom normally prevented from operation b the vibration of said support but allowe to operate when said support is stopped.

4. The combination in a loom, of a support arranged transversely thereof and capable of being thrown forward out of working position, means for moving said support back and forth across the loom, a series of detectors carried by said support and havin a limited movement thereon and normally 1n contact with the cloth, said detectors adapted to engage independently of each other cloth defects and to stop said -support, 'and means for stopping said loom normally prevented from operation by the movement of said support but allowed to operate wlien the support is stopped.

5. The combination in a loom, of a lay, a

- bar, yielding means for moving the same longitudinally in opposite directions before alternate forward strokes of said lay, detectors pivoted on said bar and having surfaces in frictional contact with the surface of cloth in said loom, said detectors being adapted to be rocked on their pivotsy by such contact and having fingers on op osite sides of said pivot adapted to engage de ects in said, cloth and to prevent the further movement of said bar, a shipper, a holding-plate having a shi per-retaining notch, a knock-oil:`

lever, a unter carried by said lay and adapted to ride upon said bar above said` knock-off lever when said bar is at either end of its movement, said bar having a notch each detector having stop projections on` opposite sides of its pivot adapted'to strike said ledge and to limit the movement of said detector on said pivot and each detector having fin ers on opposite sides of its pivot adapte to engage defects in said cloth and to stop the movement of said bar,- and means for stoppin said loom normally prevented from operation by the movement of said de- L tector, but allowed to bar is stopped. v

In Witness whereof, I have affixedA my signature in presence of two witnesses.

ORREN A. SAWYER.

operate when said Witnesses:

ALBERT M. Moonn, LUDGER A. NIooL. 

